Executive Summary

Title Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software Denial of Service Vulnerability
Name cisco-sa-20181031-asaftd-sip-dos First vendor Publication 2018-10-31
Vendor Cisco Last vendor Modification 2018-10-31
Severity (Vendor) N/A Revision N/A

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:N/C:N/I:N/A:C)
Cvss Base Score 7.8 Attack Range Network
Cvss Impact Score 6.9 Attack Complexity Low
Cvss Expoit Score 10 Authentication None Required
Calculate full CVSS 2.0 Vectors scores


A vulnerability in the Session Initiation Protocol (SIP) inspection engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload or trigger high CPU, resulting in a denial of service (DoS) condition.

The vulnerability is due to improper handling of SIP traffic. An attacker could exploit this vulnerability by sending SIP requests designed to specifically trigger this issue at a high rate across an affected device.

Software updates that address this vulnerability are not yet available. There are no workarounds that address this vulnerability. Mitigation options that address this vulnerability are available.

This advisory is available at the following link:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181031-asaftd-sip-dos ["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20181031-asaftd-sip-dos"]


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Original Source

Url : http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco (...)

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-20 Improper Input Validation

CPE : Common Platform Enumeration

Application 540
Application 41
Os 28

Snort® IPS/IDS

Date Description
2019-01-15 SIP over SCTP wildcard VIA address attempt
RuleID : 48593 - Revision : 1 - Type : PROTOCOL-VOIP
2018-12-04 SIP wildcard VIA address flood attempt
RuleID : 48265 - Revision : 2 - Type : PROTOCOL-VOIP
2018-12-04 SIP wildcard VIA address flood attempt
RuleID : 48264 - Revision : 2 - Type : PROTOCOL-VOIP
2014-01-10 SIP REGISTER flood attempt
RuleID : 20395 - Revision : 5 - Type : PROTOCOL-VOIP
2014-01-10 SIP REGISTER flood attempt
RuleID : 19389 - Revision : 9 - Type : PROTOCOL-VOIP

Nessus® Vulnerability Scanner

Date Description
2018-11-08 Name : The remote device is missing a vendor-supplied security patch.
File : cisco-sa-20181031-asaftd-sip-dos-asa.nasl - Type : ACT_GATHER_INFO
2018-11-08 Name : The packet inspection software installed on the remote host is affected by a ...
File : cisco-sa-20181031-asaftd-sip-dos-ftd.nasl - Type : ACT_GATHER_INFO

Alert History

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Date Informations
2019-01-29 17:21:26
  • Multiple Updates
2018-11-01 17:21:38
  • Multiple Updates
2018-10-31 21:19:09
  • First insertion